<template>
    <ul class="slide-box">
      <li></li>
      <li></li>
      <li></li>
      <li></li>
    </ul>
  </template>
  
  <script>
  export default {
    name: "bgAnimation"
  };
  </script>
  
  <style lang="scss">
  .slide-box {
    position: fixed;
    width: 100%;
    height: 100%;
    background: rgba(0, 134, 179, .5);
    top: 0;
    left: 0;
    z-index: 0;
    li {
      width: 100%;
      height: 100%;
      position: absolute;
      top: 0px;
      left: 0px;
      color: transparent;
      background-size: cover;
      background-position: 50% 50%;
      background-repeat: none;
      opacity: 0;
      z-index: 0;
      -webkit-backface-visibility: hidden;
      -webkit-animation: imgAnimation 48s linear infinite 0s;
      -moz-animation: imgAnimation 48s linear infinite 0s;
      -o-animation: imgAnimation 48s linear infinite 0s;
      -ms-animation: imgAnimation 48s linear infinite 0s;
      animation: imgAnimation 48s linear infinite 0s;
      &:nth-child(1) {
        background-image: url(../assets/bgA/bg-5.jpg);
      }
      &:nth-child(2) {
        background-image: url(../assets/bgA/bg-4.jpg);
        -webkit-animation-delay: 12s;
        -moz-animation-delay: 12s;
        -o-animation-delay: 12s;
        -ms-animation-delay: 12s;
        animation-delay: 12s;
      }
      &:nth-child(3) {
        background-image: url(../assets/bgA/bg-2.jpg);
        -webkit-animation-delay: 24s;
        -moz-animation-delay: 24s;
        -o-animation-delay: 24s;
        -ms-animation-delay: 24s;
        animation-delay: 24s;
      }
      &:nth-child(4) {
        background-image: url(../assets/bgA/bg-4.jpg);
        animation-delay: 36s;
      }
    }
  }
  @-webkit-keyframes imgAnimation {
    0% {
      opacity: 0;
      -webkit-animation-timing-function: ease-in;
    }
    8% {
      opacity: 1;
      -webkit-transform: scale(1.1);
      -webkit-animation-timing-function: ease-out;
    }
    17% {
      opacity: 1;
      -webkit-transform: scale(1.2);
    }
    25% {
      opacity: 0;
      -webkit-transform: scale(1.3);
    }
    100% {
      opacity: 0;
    }
  }
  @keyframes imgAnimation {
    0% {
      opacity: 0;
      animation-timing-function: ease-in;
    }
    8% {
      opacity: 1;
      transform: scale(1.1);
      animation-timing-function: ease-out;
    }
    17% {
      opacity: 1;
      transform: scale(1.2);
    }
    25% {
      opacity: 0;
      transform: scale(1.3);
    }
    100% {
      opacity: 0;
    }
  }
  </style>
  